diff --git a/requirements.txt b/requirements.txt
index e9b4f07..2abdc64 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -27,7 +27,7 @@ Pygments==2.4.2
 pyparsing==2.4.0
 pytest==5.1.2
 pytz==2019.1
-PyYAML==5.3.1
+PyYAML==5.4
 requests==2.22.0
 restructuredtext-lint==1.3.0
 six==1.12.0